我正在使用该testthat包为我的 R 包编写测试。我已按照http://r-pkgs.had.co.nz/tests.html上的说明进行操作（我相信）。我用了
devtools::use_testthat()
设置测试骨架。我在其中创建了一个测试文件，tests/testthat文件名以test. 当我devtools::test()在 RStudio 中运行或 Ctrl+Shift+T 时，测试运行成功，但是当我运行R CMD check或 Ctrl+Shift+E 时，testthat找不到我的包。我得到错误
> library(testthat)
>
> test_check("foo")
Loading required package: foo
Error in loadNamespace(name) : there is no package called 'foo'
Calls: test_check ... tryCatch -> tryCatchList -> tryCatchOne -> <Anonymous>
In addition: Warning message:
In library(package, lib.loc = lib.loc, character.only = TRUE, logical.return = TRUE, :
there is no package called 'foo'
Execution halted
我确实通过R_LIBS_SITE在我的.Renviron文件中设置来修改我的库路径。我怀疑这在运行时没有被读取R CMD check，但我认为它不应该有所作为。
当我devtools::check()从 RStudio 控制台运行时，它成功完成（包括测试），但是在 RStudio 中运行检查失败。
我添加了一些调试来testthat.R打印输出.libPaths()和其他位：
> library(testthat)
> .libPaths()
[1] "C:/Users/timk/AppData/Local/Temp/Rtmp841w0b/RLIBS_1790551706"
[2] "C:/Program Files/R/R-3.2.2/library"
> list.files(.libPaths()[1])
[1] "KernSmooth" "MASS" "Matrix" "boot" "class"
[6] "cluster" "crayon" "digest" "foo" "foreign"
[11] "lattice" "magrittr" "memoise" "mgcv" "nlme"
[16] "nnet" "praise" "rpart" "spatial" "stringi"
[21] "stringr" "survival" "testthat"
> list.files(file.path(.libPaths()[1], "foo"))
character(0)
> list.files(file.path(.libPaths()[1], "testthat"))
[1] "CITATION" "DESCRIPTION" "INDEX" "LICENSE" "MD5"
[6] "Meta" "NAMESPACE" "R" "help" "html"
[11] "libs"
可以看到在临时库中创建了包目录，但是包是空的。将其与testthat.
我还尝试下载另一个使用testthat（匿名器）的软件包，但遇到了同样的错误。
sessionInfo()：
R version 3.2.2 (2015-08-14)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 8 x64 (build 9200)
locale:
[1] LC_COLLATE=English_Australia.1252 LC_CTYPE=English_Australia.1252 LC_MONETARY=English_Australia.1252
[4] LC_NUMERIC=C LC_TIME=English_Australia.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] foo_0.1 testthat_0.11.0
loaded via a namespace (and not attached):
[1] magrittr_1.5 tools_3.2.2 roxygen2_5.0.0 Rcpp_0.12.1 crayon_1.3.1 memoise_0.2.1 stringi_1.0-1
[8] stringr_1.0.0 digest_0.6.8 devtools_1.9.1